全数字化直流电机PWM调速实验教学平台设计  

Design of Experimental Teaching Platform for Full Digital DC Motor PWM Speed-regulating System

作　　者：刘洋[1] 王钦若[1] 高军礼[1] 

机构地区：[1]广东工业大学自动化学院,广东广州510006

出　　处：《机床与液压》2017年第23期61-65,69,共6页Machine Tool & Hydraulics

基　　金：国家自然科学基金资助项目(51307025);广东省人才培养模式创新实验区项目(CXSYQ05)

摘　　要：直流电机调速实验教学综合平台以C8051F040为主控芯片,进行双闭环可逆直流PWM调速系统全数字化设计。提出一种利用C8051单片机的可编程计数器阵列输出16位PWM波的方法取代数字脉冲触发器。主要设计了电流采样、转速检测、模数转换、脉宽调制信号生成、电机驱动等电路。采用调节器工程设计方法,设计电流和转速调节器的PI参数,通过MATLAB验证和软件编程实现。该系统具有转速、电流和PI参数键盘输入和在线修改功能,电机旋转方向判断,转速、电流及功率模块的温度显示和报警功能。该实验教学平台实际运行可靠,能满足实验教学的要求。The experimental teaching platform for direct current （DC） motor speed-regulating system is based on the main C8051F040 micro-controller （MCU） , and the double closed-loop reversible pulse width modulation （PWM） DC speed-regulating full digital system is designed. The method of 16-bit PWM digital pulse wave was proposed by a programmable counter array output of using C8051 MCU to replace the digital pulse trigger. Current sampling, speed detection, analog-digital conversion （ADC）, PWM signal generation, and the motor driver circuit were designed. The methods of engineering design were used to design current regulator and speed regulator of proportion integral （PI） parameters, which were validated by MATLAB and implemented by software programming. The speed value, the current and PI parameters could be input and modified by keyboard online function of the system, the direction of motor rotation could be judged, the speed, and the current and temperature values of power modules could be displayed, with faults a- larm functions. The actual operation of experimental teaching platform is reliable, which can meet the requirements of experimental teaching.

关 键 词：实验教学 双闭环直流PWM调速 数字PI调节器 M/T测速法 

分 类 号：TG0[金属学及工艺] TP273[自动化与计算机技术—检测技术与自动化装置]